Oil well pump



G. G. BASI-1ER 2,068,729

OIL WELL PUMP Filed June 18, 1934 2 Sheets-Sheet l Jan. 26, 193'?.

5/ m @4W/ f d A Mi ww. nl w 5%@ m w a gyfww@ Jan. 26, 1937. G. G.BASI-1ER OIL WELL PUMP 2 Sheets-Sheet 2 Filed June 18, 1934 Alw EOFFERY(5L/Y BASHER BY )7am @MM vf ATTORNEYS.

Patented Jan. 26, 1937 UNITED STATE FAB OFFICE 1 Claim.

This invention relates to double acting pumps of the general characterembodied in my copending application Serial No. 715,744, filed March l5,1931i, and wherein a relatively constant stream of oil is maintained inthe entire system and is drawn upon during the regular functioning ofthe pump to effect a continuous now of oil from the well.

An object of the present invention is to provide a double acting pumpwhich embodies a simplied structure to effect a continuous ow of oilfrom the well, by creating a single flow path for the discharge of oilfrom the Well into the column in the tubing above the pump during bothstrokes of the latter, more specically to provide an arrangement ofelements enabling a hollow plunger rod to be Vutilized as the soleconduit for the passage of oil from the barrel of the pump to the oilcolumn thereabove, all in such manner as to insure maximum recovery ofoil.

Another object of the invention is to provide a pumping assembly whichis capable of being readily lowered as a unitary structure to itsworking position and operatively associated with the parts to which itis designed to be related.

Another object of the invention is to provide a pumping assemblyembodying extremely simple and ecient sealing means for preventingleakage of oil between its working parts so that the plunger of the pumpwill operate with maximum efficiency and with a uniform lift upon theoil.

With these and other objects in view, the invention consists in thenovel construction and arrangement o1 elements as hereinafter fullydescribed and particularly pointed out in the appended claim.

In the accompanying drawings,

Figure l is a vertical sectional View through the casing of a well andshowing one form of oil pump embodying this invention mounted in thecasing with the pump plunger assumed to be operating on the up stroke;

Figure 1A is a View similar to Figure 1 and i1- lustrating the lowercontinuations of the parts shown in the preceding gures;

Figures 2 and 2A are views similar to Figures l and 1A, respectively,with the plunger assumed to be operating on the down stroke.

In its present embodiment, the invention is associated with the usualwell casing l5 and an assembly of tubing sections E6, shoe Il' andsucker rods i6, the shoe being connected to the lowermost tubing sectionby a coupling collar i9, and said lowermost tubing section beingconnected to the next tubing section above by a coupling collar 23 andan intervening outer sealing liner 2l in the form of a tube threaded atits upper end into the collar 2U and at its lower end into the lowermosttubing section.

The internal surface of the outer liner 2l is accurately machined to apredetermined diameter such as to snugly receive tubular inner liners 2223 in the form of tubes accurately machined externally and rigidlyconnected in spaced relation by an axially disposed tubular guide 24which is threaded into the confronting ends of the inner liners as shownin Figures 1 and 2.

The lower end of the inner liner 22 is reduced in diameter andexternally threaded at 25 lor connection to a working barrel 26, theexternal diameter of which is slightly less than that of the innerliners 22 and 23 so as to readily pass through the outer liner 2l.

The lower open end of the working barrel 26 is controlled by a standingvalve 2l, the seat member 28 of which is provided with a dependingtubular extension 29 terminating in a tapered tubular nose 36 which isdesigned to seat in the correspondingly tapered bore of the shoe Il tosecure the working barrel in xed position in the tubing, as will beclearly understood by those familiar with the art. Between the workingbarrel 26 and the lowermost tubing section l 6, an annular chamber 3| isformed, the inlet 3| a, to which is controlled by a ball valve Sibconstituting a second standing valve and being supported axially withinthe tubular extension 29 and arranged to open when suction is induced inthe chamber. An outlet from the chamber is provided by ports 32 whichare located in the working barrel at its upper end. It will be notedthat the size of the ball valve structure Sib is such as to provideample space between it and the tubular extension 29 so as to permit thefree passage of fluid between the two.

Reciprocably mounted in the working barrel 26 is a hollow plunger 33which co-acts with the working barrel to provide chambers lllv and35,respectively, above and below the barrel. The inlet to the chamber 35 iscontrolled by the aforestated standing Valve 2l which opens when suctionis induced in the chamber by the plunger. The outlet from the chamber 35is controlled by a traveling valve 36 in the lower open end of theplunger 33, which traveling valve opens when pressure is created in saidchamber by the plunger.

An inlet to the chamber 34 is provided by the aforestated ports 32 atthe upper end of the working barrel, and an outlet from this chamber iscontrolled by a ball valve 31 constituting a second traveling valvewhich is axially sup-ported 'within an inverted cup-shaped connector 38threadedly secured at its lower end to the plunger 33 and at its upperend to a hollow plunger rod 39 in turn threadedly connected to thelowerrnost one of the sucker rods I8. The size of the ball valvestructure 31 is such as to provide suicient space between itself and theinternal wall of the connector 38 for the free passage of uid from. theinterior of the plunger and from the chamber 34 into the hollow plungerrod 39 from which the iluid is adapted to discharge into the tubingabove the pump, through ports lil provided in the plunger rod at itsupper end. The ball valve 31 is arranged to open when pressure iscreated in the chamber 34.

It will be noted that the plunger rod 33 has a snug t in the alinedbores of the inner liners 22-23 and the intervening tubular guide 24 soas to provide a fluid-tight seal and accurately guide the plunger rod inits reciprocating movement.

In assembling the pump in the hole and assuming that the tubing I6 withthe outer liner 2l and the shoe i1 has been lowered in the casing to thedesired level, the pumping assembly suspended from the sucker rods islowered into the tubing I6 until the nose 3i) has been rmly seated inthe shoe I1 so as to secure the working barrel 26 in a fixed position,it being understood that the external diameter of the nose 33 is lessthan the internal diameter of the outer liner 2i so to freely passthrough the latter as does the working barrel. With the pumping assemblyinstalled, as shown in the drawings, the outer and inner liners co-actto provide the fluid-tight seal therebetween.

In the operation of the invention, and :assuming that the plunger 26is'moving on its upstroke, as shown in Figures 1 and 1A, the travelingvalve 35 will be closed so that suction is induced in the chamber 35 tosuck oil from the well through the nose 30, extension 29 and seat member28 into the chamber. Oil previously supplied to the chamber 34 from thechamber 3i surrounding the working barrel will be trapped therein, dueto the fact that the ball valve 3lb controlling the inlet to the chamber3| is closed, so that concurrently with the sucking of oil into thechamber 35 the oil in the chamber 34 will be placed under pressure. Theball valve 3? controlling the outlet from the chamber 34 is thus causedto be opened and the oil in the chamber 33 ejected therefrom through theplunger rod 39 and thence through the outlet ports 4D thereof into theoil column in the tubing I6 above the pumping assembly, all as clearlyindicated by the arrows in Figures 1 and 1A.

On the down-stroke of the plunger 33, as shown in Figures 2 and 2A, thestanding valve 21 will close, thus causing oil now trapped in thechamber 35 to be placed under pressure by the plunger so as to open thetraveling valve 36 and eject the oil from the chamber 35 through theplunger, the plunger rod 33 and then through the ports 40 into the oilcolumn in the tubing I6 above the pumping assembly.

Concurrently with this operation, suction will be induced by the plungerin the chamber 34, thus closing the ball valve 31 and opening the ballvalve 3 lb to suck oil from the well into the chamber 3| surrounding theworking barrel, and then through the ports 32 into the chamber 34. Asthe next succeeding upstroke is initiated, the cycle of operation iscompleted as the traveling valve 35 then closes and the standing valve21 opens so that the plunger draws oil into the chamber 35,-concurrentlywith which thevball valve 3Ib closes and the ball valve 31 opens inresponse to the pressure imposed on the previcusly admitted oil in thechamber 3d, by the plunger 33.

It will thus be manifest that during both strokes of the plunger, oilfrom the well will be raised and advanced in the column of oil in thetubing so that the flow of oil upwardly is continuous, and all throughthe single flow course provided by the hollow plunger rod between theWorking barrel and the oil column thereabove.

What is claimed is:

In a pumping organization for oil wells, the combination with tubing, ofa liner interposed between and connecting sections of the tubing andhaving a uniform internal diameter which is less than the internaldiameter of the tubing, and a pumping assembly contained in the tubingand including a working barrel having a smooth eX- ternally cylindricalliner at its upper end frictionally received in the liner of the tubingto provide a fluid tight connection therewith and coeacting therewith tonormally hold both liners suiliciently associated with each other toprevent relative separation thereof when the pump is operating whileenabling the pumping assembly with the barrel liner to be pulled fromthe tubing, said pumping assembly having a hollow recipro-v cal plungerrod provided with a long length hollow plunger working in said barreland having a ball valve at its extreme upper end and a traveling valveat its extreme lower end, said tubing liner serving to space the wallsof the barrel from the walls of the tubing to provide a chambertherebetween for movement of liquid from the well to the bore of theplunger through the ball valve on the upstroke of the plunger and saidtraveling valve serving to admit liquid to the bore of the plunger onthe down stroke of the plunger; and valves at the bottom of the barrelco-acting with the valves of the plunger to enable the liquid' to bepumped as aforestated; all of said valves being formed, arranged andproportioned to enable all thereof to freely pass through the bore ofthe tubing liner when pulling the pumping assembly from or dropping sameinto the tubing.

GEOFFERY GUY BASHER.

